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Cube and Cube Roots — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSCube and Cube Roots1 Mark
MCQ
What.is the value of $7^3 - 6^3?$
  • A
    $126$
  • B
    $25$
  • ✓
    $127$
  • D
    $128$
✓

Answer

Correct option: C.
$127$
The above of the two cube numbers can be found as
$7^3 - 6^3 = 6^2 + 7^2 + 6 \times 7$
$36 + 49 + 42 + = 127$

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